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| <h1 class="content-header header-section1" id="ref_directive_local" itemprop="headline">local</h1> |
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| <ul><li><a class="page-menu-link" href="#autoid_106" data-menu-target="autoid_106">Synopsis</a></li><li><a class="page-menu-link" href="#autoid_107" data-menu-target="autoid_107">Description</a></li></ul> </div><a name="ref.directive.local"></a> |
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| <h2 class="content-header header-section2" id="autoid_106">Synopsis</h2> |
| |
| |
| |
| <pre class="metaTemplate"> |
| <code class="inline-code"><#local <em class="code-color">name</em>=<em class="code-color">value</em>></code> |
| or |
| <code class="inline-code"><#local <em class="code-color">name1</em>=<em class="code-color">value1</em> <em class="code-color">name2</em>=<em class="code-color">value2</em> <em class="code-color">... nameN</em>=<em class="code-color">valueN</em>></code> |
| or |
| <code class="inline-code"><#local <em class="code-color">name</em>> |
| <em class="code-color">capture this</em> |
| </#local> |
| </code> |
| </pre> |
| |
| |
| <p>Where:</p> |
| |
| <ul> |
| <li> |
| <code class="inline-code"><em class="code-color">name</em></code>: the |
| name of the local object in the root. It is not an expression. |
| However, it can be written as a string literal, which is useful |
| if the variable name contains reserved characters, for example |
| <code class="inline-code"><#local "foo-bar" = 1></code>. Note that this |
| string literal does not expand interpolations (as |
| <code class="inline-code">"${foo}"</code>). |
| </li> |
| |
| <li> |
| <code class="inline-code">=</code>: Assignment operator, which can also |
| be one of the shorthand assignment operators |
| (<code class="inline-code">++</code>, <code class="inline-code">+=</code>, etc.), just like |
| with <a href="ref_directive_assign.html">the |
| <code>assign</code> directive</a>, |
| </li> |
| |
| <li> |
| <code class="inline-code"><em class="code-color">value</em></code>: the |
| value to store. Expression. |
| </li> |
| </ul> |
| |
| |
| |
| |
| |
| <h2 class="content-header header-section2" id="autoid_107">Description</h2> |
| |
| |
| <p>It is similar to <a href="ref_directive_assign.html#ref.directive.assign">assign |
| directive</a>, but it creates or replaces local variables. This |
| only works inside macro definitions and function definitions.</p> |
| |
| <p>For more information about variables, read this: <a href="dgui_misc_var.html">Template Author's Guide/Miscellaneous/Defining variables in the template</a></p> |
| |
| <div class="callout note"> |
| <strong class="callout-label">Note:</strong> |
| |
| <p>A frequent mistake is trying to use |
| <code class="inline-code">assign</code> to change a local variable like: |
| <code class="inline-code"><#macro m><#local x = 1>${x}<#assign x = |
| 2>${x}</#macro></code>. This prints |
| <code class="inline-code">11</code>, not <code class="inline-code">12</code>, because |
| <code class="inline-code">assign</code> creates/replaces the |
| <code class="inline-code">x</code> of the namespace that the template belongs |
| to, and doesn't change the <code class="inline-code">x</code> local variable. |
| Local variables should be always set with the <a href="#ref.directive.local"><code>local</code> |
| directive</a>, not just for the fist time.</p> |
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